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??????????? ???????? ???????????????? ??????????
??????????????? ??????????????? ??????????
??????? ????????????????? ???????????
"?????????? ??????????????? ???????????
????? ?????????"
(????)
??????? "?????? ? ???????? ?????????"
???????? ??????
?? ??????????: "??????????????? ? ?????? ???????"
?? ????: "?????????????? ?????-???????? ??? ????????? ???????, ?????? 15-1213 "
????????: ??. ??. ???-444 ?????????? ?.?. ????????: ??????
????????? ?.?. ?????? 2012
??????????
1. ????????? ?????????? ?????? ? ??????? ?????????? ???????.
?????????? ??? ???????-????????????? ?????????
2. ??????? ???????????? ??????????? "????" ?? ????????? ????? ????????.
1. ?????????? ?????? ? ??????? ?????????? ???????.
?????? ??????????? ?????????? ???????????? ??? ???? ???????? ???????:
?0- ???????????? ???????
??- ?????????? ???????
??- ???????? ???????
??????????? ?????????? ???????????? ?? ????????:
?0=Sk-d?+q+?+k1-k3]
E?= Sk-d?+q+?+k2(2l-n)n+k1-k3
E?=( Sk-d?+q+?)*(2l+2n)/2l+[k2(2l+n)n-k1-k3]
???:
Sk - ?????????? ????????? ???????? ?????? ????????? ?????;
d? - ?????????? ????????? ???????? ?????????? ????? ??????????? ??????? ??????? ?????;
q ? ? - ??????? ?? ?????? ?????????? ???????;
k1 = (1000*lt^2)/2R - ??????????? ??????????? ??????? ??????? ?? ???????????;
R- ?????? ?????? (200)
k2=1000/2R - ??????????? ??????????? ??????? ??????? ??????;
k3 - ???????? ??????????????? ???????? ?????? ? ???????? ?????????? ?????? ? ??????
??????????:
??? ??????????? ?? ? n=l, ? ??? ??????????? ???n=(L-l);
???? ???????? ? [ ] ?????????????, ??? ?? ???????????.
?????????????????????????? ?????????? ???????????????41-?11.27.83.7 K1=(1000*1.85)/400=2.139 K2=1000/400=2.5
K3=180
Q+w=31
Sk - d?=26
?0=26+31+[2.139-180]=57
E?= 26+31+[2.5*(7.8 - 3.9)*3.9+2.139 - 180]=57
E?=26+31* (7.8+3)/7.8+2.5*(7.8+1.5)*1.5- 2.139 - 180]=78.9
2B=2(B0 - Emax)=2(1700 - 78.9)=3240.2
???????-????????????? ?????????
? ?????????aiV??ili?i?i1?????0.31.2512000.9812??????0.51.26960.9813???????0.21.39000.981 ? ??? ????????? ??????? ??????????? ???????? ??? ??????, ? ??????? ??????????? ????????? ?????. ??? ?????????????? ?? ???????:
,
???: - ???? i-?? ????? ? ????? ??????, %;
?ci - ??????????? ???????? i-?? ?????, ??;
,
??? vi - ???????? ????? i-???? ?????.
??? ???????? ????? ????? ????? ???? ???????? ?? ???????:
??? D? - ?????????? ??????? ????? ????????; D? = 3.2 ?;
L??? - ???????? ????? ?????; L???= 5.597 ?;
h? - ?????? ?????, h? =1.6 ?.
Vk=(3.14*?3.2?^2)/2(5,596 - 1.6/3)=81.4
Pc1 =81.4/1.25=65.12
Pc2=81.4/1.2=67.83
Pc3=81.4/1.3=62.61
P??=(0.3+0.5+0.2)/(0.3/65.12+0.5/67.83+0.2/62.61)=65.79
????? ?????????????? ??????? ???????????? ???????? ?????? :
????=(?ai*li)/(?(ai*li)/Pci);
????=(0.3*1200+0.5*696+0.2*900)/((0.3*1200)/65.12+(0.5*969)/67.83+(0.2*900)/62.61)=65.63
???????? ???????? q??:
q??=?_???/(2l_?? );
q??=65.63/12.02=5.46
??????????? ???? ??:
??=?/?;
??=24.7/66=0.37
??????????? ????????????? ??:
??=(?*(1+ a???))/?_??? a??? = 0.3
??=(24.7(1+0.3))/65.63=0.49
2. ?????? ????? ????????
??????? ???????:
s1=PR/2h;
s2=PR/h;
???:
R - ?????? ????????, 160??,
h - ??????? ?????,1??,
? - ?????????? ???????? ? ?????
?=Nu/F_?? ;
???:
F??=pR2
Nu=N*P/(T+P)
N=350 ?
Nu=350*66/(24.7+66)=254.7?=254685??
?=254685/(3.14*?160?^2 )=3.168 ??/????^2 ?????? ?????????? ??? ????? ????????:
s1=(3.168*160)/(2*1)=253.4
s2=(3.168*160)/1=506.9
?????? ?????????? ??? ????? ????????:
s1=(3.168*160)/(2*1)=253.4
s2=(3.168*160)/(2*1)=253.4
?????? ?????????????? ??????????: ??? ????? ????????
s???=v(s_1^2-s_1*s_2+s_2^2 )
s???=v(?253.4?^2-253.4*506.9+?506.9?^2 )=439
??? ?????:
s???=v(?253.4?^2-253.4*253.4+?253.4?^2 )=253.4
???????????? ??????????? ???????? ?? ??????? ?????????:
???=0.92*(E*h^2)/(l*R)*v(h/R);
???:
R=160??
E=2.1*106 ??/????^2 h=1??
l=959.4??
???=0.92*(2.1*?10?^6)/(959.4*160)*v(1/160)=0.99
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